org.araqne.logdb.mongo.query.MongoFindCommand.java Source code

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Here is the source code for org.araqne.logdb.mongo.query.MongoFindCommand.java

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/**
 * Copyright 2014 Eediom Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.araqne.logdb.mongo.query;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.araqne.logdb.DriverQueryCommand;
import org.araqne.logdb.Row;
import org.araqne.logdb.mongo.MongoProfile;
import org.bson.types.BSONTimestamp;
import org.bson.types.BasicBSONList;
import org.bson.types.Code;
import org.bson.types.CodeWScope;
import org.bson.types.MaxKey;
import org.bson.types.MinKey;
import org.bson.types.ObjectId;
import org.bson.types.Symbol;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.MongoClient;

public class MongoFindCommand extends DriverQueryCommand {
    private final Logger slog = LoggerFactory.getLogger(MongoFindCommand.class);

    private MongoCommandOptions options;

    public MongoFindCommand(MongoCommandOptions options) {
        this.options = options;
    }

    @Override
    public String getName() {
        return "mongo";
    }

    @Override
    public void run() {
        MongoProfile profile = options.getProfile();

        MongoClient mongo = null;
        DBCursor cursor = null;
        try {
            mongo = new MongoClient(profile.getAddress(), profile.getCredentials());

            DB db = mongo.getDB(options.getDatabase());
            DBCollection col = db.getCollection(options.getCollection());
            cursor = col.find();

            while (cursor.hasNext()) {
                DBObject doc = cursor.next();

                Map<String, Object> m = convert(doc);
                pushPipe(new Row(m));
            }
        } catch (Throwable t) {
            slog.error("araqne logdb mongo: cannot run mongo.find", t);
        } finally {
            if (cursor != null)
                cursor.close();

            if (mongo != null)
                mongo.close();
        }
    }

    private Map<String, Object> convert(DBObject doc) {
        Map<String, Object> m = new HashMap<String, Object>();

        for (String key : doc.keySet()) {
            m.put(key, convert(doc.get(key)));
        }

        return m;
    }

    /**
     * convert bson types to java primitives. BasicBSONList, Binary,
     * BSONTimestamp, Code, CodeWScope, MinKey, MaxKey, Symbol, ObjectId
     */
    private Object convert(Object o) {
        if (o instanceof BSONTimestamp) {
            return ((BSONTimestamp) o).getTime();
        } else if (o instanceof Symbol || o instanceof Code || o instanceof CodeWScope || o instanceof MinKey
                || o instanceof MaxKey || o instanceof ObjectId) {
            return o.toString();
        } else if (o instanceof BasicBSONList) {
            List<Object> l = new ArrayList<Object>();
            for (Object item : ((BasicBSONList) o)) {
                l.add(convert(item));
            }

            return l;
        } else {
            return o;
        }
    }
}